Many, many of these are subjective judgements rather than true bugs. That noble council mission specifically tells you to send a diplomat to secure ownership of the particular province from the other faction, not an army. Janissary Heavy Infantry perform much better on the battlefield than their stats indicate, much as Varangian Guard perform much worse than they should according to their stats. Retinue Longbowmen aren't better archers than Yeomen, but they are armored. That's the difference.

The trait/ancillary triggers are fairly obvious mistakes. Some troop stats are wrong.